Finding Minimum Friction for Static Wedge: A Free Body Analysis Approach

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Homework Help Overview

The discussion revolves around determining the minimum coefficient of friction (μ) required for a wedge to remain static under certain conditions. The problem involves analyzing forces acting on a wedge and its interactions with other masses.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are examining the forces acting on the wedge and questioning whether all relevant forces have been identified. There is discussion about the nature of the wedge (massless or not) and the presence of friction. Some participants are clarifying the roles of tension forces in the analysis.

Discussion Status

The discussion is ongoing, with participants exploring different aspects of the problem. Some have provided guidance on conducting a free body analysis, while others are clarifying assumptions about the wedge and its interactions with other components.

Contextual Notes

There is a note that the wedge has mass and that its surface is smooth, which may influence the analysis of forces and friction. Additionally, the original poster is seeking confirmation on the forces they have identified.

safat
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Homework Statement


Find the minimum μ required between wedge M and ground so that it stays static.


Homework Equations



I already found the equations for accelerations and tension (when μ is big).
Do I need them?

The Attempt at a Solution


I would like to know whether I found all the forces acting on the wedge. (see attachment)
Which component should I use for the green arrow force?
NB the red forces act on the wedge
 

Attachments

  • Screenshot from 2013-03-11 20:31:41.png
    Screenshot from 2013-03-11 20:31:41.png
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Last edited:
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Is the wedge massless? Is there friction between the wedge and M1?
 
no, wedge has mas M, and its surface it's smooth.
 
F1 and F2 are the tension, yes?
 
I think so.
 
Go through the usual free body analysis on the two blocks (assuming the wedge is stationary) to find the acceleration and the tension. Then figure out the forces the tension applies to the wedge.
 

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